Portable warming appliance for burning solid fuel



United States Patent M 2 6 2m. m d n e u .n u C n s u e v c n n u e u rn .m n e m R h c m e S f o M .N F 0 m 5 5 n .h m w d 0 m w M M c o nT im m a a a a m M 9 mmw mAms YmKw r 0 m h n I w w h A n. H 7 2 UNITEDSTATES PATENTS [22} Filed Jan. 4, 1968 m s "r n 0 u" w u n n W u u ".hal m H mm mm H 60 "t. G {H .1 o h n 0 d flW e r w am o a e OPQAWRIME .w963 9674 92566003 89999999 H HHHHHHHHM 822 98 n W 6864 0 E 65052538 N9790550 m 3026236. U 3 5 n 223 l 7 6 9 l .h 2 b R e I. F 0 7 7 F 66 b E99 C 11 2 N 2 2 A 22 mm u m% ,3 P FF mm M my L 9 07 44 NE J 8? [U 5 7 6%NF ll s RD um l VaZZ 0 .J44 s MG w y m TM m m RR 3 CU PP PB .ll 1!] 52 14 43 33 5 [l [l I Attorney-Linton & Linton 14 Claims, 9 Drawing Figs.

44/10 ABSTRACT: Solid fuel for warming human body contained A6lf 7/06[51] Int. mainly in case and burning appliance thereof,

PATENTED 0501 51970 3.547.100

sum 1 or 4 INVENTOR. YHSUMHSA USU! ATTO RNISYS PATENTED um slam I3,547,100

' saw a nr 4 INVENTOR. YASU/YMSH USU! MWM ATTORNEYS PORTABLE WARNINGAPPLIANCE FOR BURNING SOLID FUEL This application relates to solid fuelfor supplying agreeable calories and warming human body by directattachment thereto with a case in the cold weather or a cold northerndistrict and an appliance for burning said solid fuel.

In either the cold weather or a cold northern district human beingshould be well active. Especially for instance in skiing, skating,playing ice hockey or fishing not only players and fishers but alsospectators are exposed to cold wind. In such cases we naturally wantwarmth. However warming appliances hitherto used are not necessarilysuitable to the above cases. For instance a stove is too large to beutilized in the above cases even when it utilizes electricity, gas orany other heat source. Various kinds of electric heating appliancesrequire to be connected to electric source by means of cord. Althoughthey can be used widely indoors, they cannot be used in sports or otherswhich require various movements of players.

The present invention is directed to providing a new solid fuel suitablefor being attached to and warming human body in the cold weather or in acold northern district and an appliance for burning said fuel. Namelythe basic object of the present invention is to provide a solid fuelwhich continuously burns appropriately over a pretty long time in acompact com- Ibustible appliance thereby supplying calories to humanbody effectively. To this end, according to the present invention, a:mixture of woody carbide powder is blended with assistant lcombustionagent producing oxygen with combustion, such as potassium nitrate leadacetate, starch or other binder respectively in appropriate quantities,kneaded with water, then molded by extrusion and dried. A solid productthus obtained is uniformally sized, shaped and blended and burnsconstantly. When a bar-shaped product in a fixed length is fired at oneend, it burns continuously up to the other end for a pretty long time.

Assistant combustion agent such as potassium nitrate, lead acetate,uniformly distributed in structure promotes combustion by producingoxygen and does not go out. On the other hand the oxygen effectivelyinhibits the generation of ,carbon monoxide due to combustion of woodycarbide,

thereby protecting human body from being harmed by this .gas.

Starch or other binder gives appropriate bonding property :to product,thereby preventing break or cracking of product .to the utmost inhandling or use.

Thus a small solid fuel for warming human body which .burns uniformlyand smoothly for a predetermined time can be obtained.

Another object of the present invention is to burn a relatively smallsolid fuel continuously for more than 8 hours. Generally our daily lifeis sectioned in 8 hours or so. For instance working hours and sleepinghours are in a way standardized to 8 hours. A warming appliance usedunder such a life condition must burn for 8 hours or more. If it burnsout in less hours, two or more solid fuels come to be burnt. This meansthat a user of such solid fuel has to carry a spare of solid fuel withhimself at all times as well to be an uneconomical matter. With amixture of components at specific ratios and a specific adjusting meansthe present invention secures continuous combustion for 8 hours or more,preferably 8 to 10 hours. Thus one solid fuel can sufiice in tune withthe section of our daily life, such as working hours, sleeping hours,etc., with no need of a spare. Further one fuel solid is enough to eachsection of life circumstance to a great economy without meaninglesscombustion.

Another object of the present invention is to obtain a solid fuel withabove properties, made of easily and constantly available raw materialsof low cost, not requiring high-priced and uneasily available materials.For giving a desirable conitinuity of combustion to the above warmingsolid fuel, a carbide with a relatively light specific weight such ascarbide of flax stalk is essentially used as raw material. Since thepresent warming solid fuel is burnt in a case substantially closed andobstacles the circulation of air, it is essential to secure thecombustion continuity by blending for example carbide of flax stalk.However the carbide of flax stalk is made of stalk of flax (flax stalk)with flax removed from skin layer. The stalks of flax collected fromfarmers little by little are sorted and car bonized. The carbonizedstalk costs are unexpectedly high due to collection expense andtransportation expense so that it is priced several times or more ashigh as the price of either raw material (woody carbide), while thesupply of carbonized flax stalk is very instable with drasticfluctuation of price due to yearly reduction of production. Thereforethe production of solid fuel, using carbonized flax stalk as mainmaterial inevitably becomes fluctuating. The present invention, using noor little carbonized flax stalk, can produce a warming solid fuel withthe above characteristics from forexample easily and continuouslyavailable saw dust by taking a special adjusting step. Saw dust is soamply produced from saw mills all over the world that they are disposedeven by paying freight. It is indeed easily available. Further since noflax carbide is used or the quantity of use thereof is limited, thepresent invention can avoid disadvantages due to light weight ofcarbonized flax stalk and other causes. Owing to light specific weightof flax stalk, a solid fuel made of flax stalk carbide is naturallyincreased in volume for having a predetermined combustion hour andproducing predetermined calories so that it requires a larger sizedcase. Even if a solid fuel made of flax stalk is' small sized for asmall thin case, it is unsuitable to be used in skiing or other wintersports, because it burns out naturally in a short time and istroublesome for handling. Other disadvantages of small sized solid fuelare that the extrusion formation requires a strong extrusion force andthe products even made of sufficiently kneaded raw material are apt tolack homogeneity and easily break. The present invention which adopts noor little flax stalk carbide can solve all these disadvantages.

Another important object of the present invention is to provide a casewhich is desirable for accommodating the above solid fuel and burningit. To this end the present invention uses a case with an openable andsubstantially perfectly closable body provided with small holes onperipheral surface and filled with noncombustible fiber wool such asglass fiber, asbestos, rock wool and slag wool. The above solid fuelinserted into this noncombustible fiber wool is burnt. Thenoncombustible fiber wool such as asbestos and rock wool is well known.The combustion heat of solid fuel inserted in noncombustible fiber woolprevails into fiber wool structure very slowly with gradually loweringtemperature and at last reaches the case. The circulation of air isobstacled by this fiber wool structure and similarly slows down. Such acase namely fuelburning appliance can slow down both heat transfer andcirculation of air, moderate the effect of combustion heat to humanbody, and control combustion speed effectively in a small body. It canbe carried in a pocket or the like and attached to human bodyirrespectively of whether any assisting attaching means such asunderband is used or not.

Another object of. the present invention is to control the state ofcombustion of solid fuel by using a fuel-burning appliance, namely acase. in case of a rod-shaped solid fuel of the present invention, whichis firstly fired at one end with match, lighter or others and placedin acold case, it is essentially required to expand combustion as rapidly aspossible at the time of firing for continuation of combustion and give awarm sensation to a wearer quickly. If the rapid expansion of heat incase at the beginning of combustion is not devised, heat is taken bycold case so that a solid fuel partially fired with match or a lighterpromptly goes out, leaving a part-of solid fuel, not or incompletelyburnt. Further when the combustion advances for instance to the middleof rod-shaped solid fuel, it is acceleratedly activated, increasingcalories in case. Then the combustion may not only overheat the case orcloth,-but also give unpleasant sharp painful feeling to a wearer andsometimes even produce a burn on a wearer. Accordingly in the middlestage of combustion, such undesirably activated combustion should beinhibited. In the final stage the heat However such a solution-is quiteinappropriate for producing this kind of solid fuel and must at leastrelay upon the way of jointing individually manufactured portions withdifferent composition. As well known especially such a joint portionmuch affects the state of combustion and makes impossible thecontinuationof combustion so that it is the most important cause ofgoing out. The present invention intends to solve problems of adjustmentand control of combustion by changing the number of perforationsprovided in case. This change of number of perforation changes theamount of air to be supplied into the portion of solid fuel, held innoncombustible fiber wool, so as to make effective expansion ofcombustion at the early stage of firing, control of excessive expansionof combustion at the middle stage of combustion and promotion member forattaching fuel-burning appliance of the present invention to human body.

To explain the present invention with reference to the embodimentillustrated in the attached drawings, a solid fuel ac cording to saidinvention generally uses as raw material saw dust of pine, cedarJapanese cypress, or chips of similar wood.

Said raw material iscarbonized and powdered to l50-250 mesh or powder ofwoody carbide such as powdered charcoal.

mixed with 20 percent or less of powdered hemp stalk carbide of 150-250mesh. I weight parts of this powdered carbon is mixed with 15 weightparts or less of combustion assisting material such as potassium nitrate(nitrate of soda), lead acetate (Sugar of lead) and I weight parts orlessof binder such as starch of flour or others, or carboxymethylcellulose (C.M.C.), kneaded together and molded. A typical example ofblendis shown below.

Woody powder made of carbonized mixture of saw dust of pine, cedarJapanese cypress, 90%.

Hemp stalk carbide powder,

Chemical compositions of woody carbide and hemp stalk carbide arerespectively exemplified below.

Pure carbon calorific value Caloriflc value,

Kcal.

Volatile element, percent Fixed carbon, percent Water, Ash, percentpercent of combustion at the final stage of combustion. This eliminatesthe going out of solid fuel and exerts the warming effect from thebeginning of use with addition of advantageously long durablecombustion.

Another object of the present invention is to provide a decent productof high merchandise value. To this end the present invention firstlyspreads aluminum powder on the peripheral surface of rod-shaped solidfuel. This silver and lustrous aluminum powder heightens the beautifulappearance of periphery of solid fuel and prevents carbonized powder tostick to and soil finger and others, when a solid fuel is placed in acase with fingers. Further such aluminum powder does not leave much ask.In the present invention a case is finished into a rounded decent shapeand disposed with perforation preferably in the form of pedals of floweror in dot so as to increase beautiful appearance of case. Although thecase is formed of metal, its appearance is held beautiful by plating,painting or a velvetlike cover. When necessary, said case is envelopedin a velvet or other cloth bag which has effects of raising merchandisevalue as well as moderating warming effect transmitted to human bodyfrom case.

A number of other characteristics, concrete constitution and efi'ect andmerit of the present invention will be better understood from thedescription of embodiments based on the attached drawings. Wherein FIG.I is a perspective view, showing a typical example of a solid fuel ofthe present invention, partly cut away to show the section.

FIG. 2 is a perspective view showing a variation of embodiment of thepresent invention adapted especially to long combustion.

FIG. 3 is a perspective view showing an example of a fuel burningappliance.

FIG. 4 is a plan view showing the open state of the same appliance. Y 7

FIG. 5 is an enlargedside view of a portion of the same appliance.partly cut away to show internal structure.

FIG. 6 is a perspective view of frame of the same appliance.

FIG. 7 is a perspective view of a variation of engaging means of case ofthe same appliance.

FIG. 8 is a perspective view, partly cut away, of fuel burning applianceof another embodiment.

FIG. '9 is a perspective view, partly cut away, of band parts of carbidepowder of the above composition is mixed with Parts Blending ratio ofwater is adjusted appropriately in the range of about 50-100 partsrelative to 100 parts of carbide powder. These materials aresufiiciently kneaded by kneader, extruded from nozzle by extrusionforming machine, molded, cut in a fixed length, and dried up to 3-5percent of water to become a final product. A product dried to watercontent of about 3 percent is left in the air to have water content ofabout 5 percent or less by absorbing water in the air.

An explanation will be given on the above blending. I00 parts of carbidepowder, raw material, with addition of about 10 parts or a little moreof combustion assisting material such as potassium nitrate, lead acetatecan burn almost appropriately without mixing hemp stalk carbide powder.Especially in case of use for instance in bed in sleeping, not beingattached, to human body, a case namely fuel-burning appliance isrelatively large sized. A solid fuel to burn in said case is alsonecessarily larger in diameter so that about 3 parts of combustionassisting material will suffice and hemp stalk carbide powder isneedless. Either potassium nitrate or lead acetate as combustionassisting material produces oxygen and inhibits the production of carbonmonoxide for good and smooth combustion. As the result of practicalexaminations, the inventor confirmed that the addition of lead acetateis particularly effective for obtaining perfect combustion. As binderstarch or C.M.C. is widely used, but resinous binder is not preferred.

In kneading these materials and molding by extrusion, it is essential toactuate sufficient compressive force for desirable compact molding. Tothis end the kneaded materials is introduced into extrusion mechanismprovided with a extrusion cylinder formed in connection with a hopperand given an extrusion compressive force in the order of 5 l 0 kg/cm byactuating a screw with progressively narrowing pitches in nozzle portionof said extrusion cylinder. Namely with increase of extrusioncompressive force the product becomes compact to have a longercombustion time but on the other hand tends to lower combustibility. Sothis force must be determined appropriately within the above rangeaccording to the condition of kneaded material. When extruded, a moldingshould essentially be received so as not to break, crack or wrinkle. Tothis end nozzle is so positioned as to make an angle of about 45- 70relative to the surface of conveyor which is driven correspondingly to aspeed of extrusion molding of solid fuel. A molding extruded ininclination of can be smoothly produced in quantity without producingwrinkle and cracking especially by being curved on conveyor to be worse,under action of conveying action of conveyor. The molding thuscontinuously molded by extrusion is cut in a predetermined length (Forinstance 80 mm), dried and spread with aluminum powder on its surface tomake a final product.

In order to obtain solid fuel of easily available saw dust, using littlehemp stalk carbide, woody carbide is used in two quite different formsof use. The one consists of ultrafine powder in the order of 300-400mesh in the greater part, and the other consists of powder of 200 meshor higher mixed with some coarse powder of about 150 mesh. These twokinds of material are mixed together with addition of said combustionassisting material, binder and water, kneaded, molded by a extrusionmolding machine, cut in a certain length and dried. Dried solid (pocketheater) fuel is appropriately coated with aluminum powder to make thefinal product similarly to the aforementioned.

The present invention which adopts raw material less combustible thanhemp stalk carbide, such as woody carbide has successfully improved thecombustion quality of woody carbide by using ultrafine powder of 300mesh or more of woody carbide in the greater part. Breaking property dueto use of ultra fine powder can be positively avoided by appropriatelyadding coarse woody carbide of 200 mesh or more. A mixture of two kindsof woody carbide is made a compact structure body by extrusion so as tomake bonding efi'ect of past material blended in mixture for making aproduct of high strength.

Further in the extrusion molding, the addition of water more thanconventional solid (pocket heater) fuel by 3 percent or more ispreferred. By adding such relatively large quantity of water, combustionassisting material and binder can be easily mixed with raw materialcarbide and extrusion force exerted by screw mechanism of extruder orthe like can be reduced to one third of that exerted by conventionalmechanism for quick and smooth operation of extruder. Thus a finalproduct of constant and uniform quality can be obtained simply with highefficiency. The blending ratio of coarser woody carbide relative toultrafine powderof woody carbide is generally about 8-30 percent. At asmaller radio the above rigidity cannot be obtained. At a ratio over 3percent the improvement of combustionas achieved by the addition ofultrafine powder is not realized. In either case, no desirable productcan be obtained. Water should be added at a ratio of 70-l00 weight partsof raw material carbide. As above stated such a small quantity of watercan realize uniform mixture and smooth extrusion.

A method of making a solid fuel of the present invention is illustratedconcretely as follows:

Ultra fine powder of saw dust carbide of 300 mesh or more parts 40Coarse saw dust carbide of 100-150 mesh do 10 Water"--. do 40 Potassiumnitrate kg. 15

Led acetate kg. 15 V Flour starch kg. 2. 5

molded and dried is appropriately available as fuel of a large fuelburning case, such as burning case used in sleeping bed. Here, for ascrew-type extruder, only one-third of extrusion force requiredbyordinary extruder namely 3-5 kg/cm is enough. Product thus obtaineddoes not break at all in leading or other operations. lts combustionlasts for an appropriate time with appropriate heating power. In saidproduct tobacco stalk carbide, powdered charcoal or a small quantity of'hemp stalk ash may be mixed for improving the firing, if. necessary.However as above stated, a solid fuel of the present inventionsubstantially consists of ultrafine powder saw dust carbide of 300 meshor more especially 300-400 mesh as main component blended with 8-30percent of coarse saw dust carbide of 200 mesh or less especially of I00I 50 mesh.

A product mold by extrusion of the present invention may be shaped insectionally round, elliptic, oval or angular rod. However in shapepreferably adopted by the inventor as shown in FIG. 1, a sectionallysomewhat elliptic rodlike body 1 is provided in the middle portion witha pretty wide and shallow groove 2 and on both sides with arcuate bulgedportions 3, 3 so that it is sectionally shaped like cocoon. The surfaceof said product is coated with a layer of aluminum powder. Thissectional contour of solid fuel is easily given by shape of nozzle foran extruder. Owing to above elliptical section, a solid tobacco can beheld in stabilityin noncombustible fiber wool. Especially the shallowgroove 2 formed improving the middle portion and the bulged portions 3,3of both sides ensure the stability and the fixation in fiber wool. Saidshallow groove 2 formed in the middle moderately tightness the middleportion of elliptically extruded molding so as to make a wholly compactstructure of solid fuel. I I

Typical actual dimensions of solid fuel as shown in FIG. 1 are asfollows.

Width (Long dia. of ecllipse) mm. 15 Thickness (at both bulged portions)mm. 8 Thickness (Grooved portions 2,2) mm. 7. 5 Length mm.

A solid fuel of the above dimensions can burn continuously for more than8 hours even for the use described hereinafter. If it is required toburn longer, a solid fuel is molded as shown in FIG. 2 and givencompactness similarly to that of FIG. 1. Namely the rod-shaped body isU-shaped by curved portion 4 in the middle, thereby being substantiallytwice a solid fuel of FIG. l'in length so that it continues to burn fortwice or more time as long as the combustion time of the same. InU-shaped solid fuel, the one side portion is so short as to correspondto width. For packing a U-shaped solid fuel, it must be handled incombination with another U-shaped solid fuel as shown by imaginary linein FIG. 2. In this way solid fuels can be packed substantially incompactness and are not broken in handling and transit.

A solid fuel of the present invention burns in fuel burning appliance asshown FIG. 3 and the following. To explain a basic fuel burning case asshown in FIGS. 3-6, case members 11, 11 are openably and closablyconnected in pivotting portion 12 of one side of case and respectivelyfilled with inorganic fiber wool 13, such as glass fiber wool, rockwool, slag wool which is held by frame plate 14 fit inside said casemember 1 l. A rod-shaped solid fuel 1 positioned in said frame is heldby inorganic fiber wool l3, l3 and burns. Said case members l1, 11 arerespectively provided with round hole 8 in the middle portion. In bothside portions 5, 5' corresponding to firing position and ending positionsaid case member is provided with slots so combines as to formflowerlike or radial pattern 6 for increasing ventilation. Among slots 7arranged in the form of flowers 6 one slot 5 is far longer than adjacentslot (approximately twice) so as to have maximum ventilation in slot 5.Said slot is thereby made firing position, as indicated by arrowliketriangle hole 9. In the drawing 15 is a flat platelike engaging metalpivotally provided to one case member I. Said metal is engageable withand disengageable from depressed case members so that it is not caughtby velvet or other textile -or knitted cloth as shown in FIG. 1, whenthe case is put in or taken out of bag 16. Said U-shaped engaging metal15 closes case members 11, 11 with strength so as to fit them intoengaging depressed portion 10. Accordingly they do not open bythemselves without being noticed by a wearer during handling. In frameplate 14 fit for holding fiber wool 13, 13 opening 12-17 is formed inthe middle so as to receive solid fuel 1. In the f opening 17 theportion correspondingto'firing position forms particularly enlargedopening portion 17' so as to position the '-fired portion of solid fuelpositively there as well as to facilitate supply of air to firingportion.

In fuel burning application of the above construction, case :members canchange sectional area of perforations for ventila- IQtion freely bymeans of round hole 8 provided in case members and slots appliance incombination. This controls supply I ,of air to respective portions ofsolid fuel 1 as desired for com- 'tbustion of respective portions. Thefiring point raises temperatime from room temperature to a necessarytemperature in a relatively short time; the middle portion controlsquantity of supply of air appropriately and moreover can increasequanti- :ty of supply of air again in the portion of combustion endingfportion of solid fuel 1 where perfect combustion is not ex- .pected dueto scarcity of ,calory, thus making possible effecg tive perfectcombustion in whole solid fuel. Accordingly slots 7 can be of smallnumbersso that they do not reduce much -vstrength of case members 1.Further said slot checks inorganic f ber material 3 to go out of largeround opening. Further slot is seldom clogged by tar or others producedin solid fuel 1 and "js'o appropriate and effective combustion isobtained for a long time. Slots 7 may of course be arranged to composeappropriate patterns so as to give case members beautiful appearance.They thus contribute to fancy appearance of product.

1 Engaging metal l5of the embodiment as shown in FIGS. 3- 6 may beappropriately changed. FIG. 7 shows a preferred mode of variation.Although it is constituted similarly to the embodiment as shown in FIGS.3-6, a metal wire of appropriate thickness is curved 20 by pivotingplate 18 provided ,to one case member 11. At one end of said metal wire,engaging metal 15 rotatably provided with roller 19 is pivoted. Theother case member is provided with depressed engaging portion forengaging and disengaging roller 19 of engaging metal In the middleportion of engaging metal 15' curved portion 21 is for receiving flange22 fitting in case member 1 1, 11 is formed correspondingly to saidflange.

"Another embodiment of fuel-burning appliance according tothe presentinvention is shown in FIG. 8. In this embodiment, the metal case members1 l, 1 1 is of similar construction asthose shown in FIGS. 36. Howeveras engaging metal, in place of armoring system shown in FIGS. 3-6 andFIG. 7 a publicly known engaging means is'adopted. Namely engaging metalappropriately elastically mounted in one case :rnember 11 is engageablewith and disengageable from engagfin'g hole 24 of fitting edge ofanother case member. A small portion of said engaging metal 25 isexposed outside and proj'ected. By pushing projecting portion 26,engaging metal 25 is disengaged from engaging hole 24. Case members l1,11 thus substantially smoothened outside are covered with velvet orother cloth piece 27 by posting. Said cloth piece 27 moderatescombustion heat and transmits it to human body. On the otherhanditprevents cold case members 1 l, 11 to come in contact directlywith human body, not to give it disagreeable feeling and cool feeling,and can save bag 16 as shown in FIG. 3. By

; this, painting, plating or other surface treatment may of course besimplified.

.,Practically for attaching fuel-burning appliance to human body, it isput in bag 16 and can be held under band, in a waist band or in otherway, with the bag. However especially for convenience, the presentinventionuses a special band as dle portion thereof, less perforationsthan the preceding.

shown in FIG. 9. On the upper edge of bag 31 formed with appropriatelyobliquely reduced corners of both sides, zipper or other closing means33 is provided to form opening 32. On both sides of bag 31 expansionband 34 provided with adjusting member 35 adjustable in length asdesiredand another expansion band 34 provided with engaging member 36 atthe end are provided so as to open said opening 32 forenveloping a fuelburning appliance therein. Accordingly by means of said wearing band, afuel-burning appliance can be applied in stability to any of mainportions of human body such as belly, shoulder, back. When it is appliedin close contact with backside of trousers under band, it does not goout due to interruption of ventilation through sophistically providedvent holes, caused by choking of said holes of upper and lower surfacesof case under pressure as is the case with flat case. Further saidwearing band keeps the case on human body at all times even whentrousers are taken off. Since it can be used by adjusting not to giveundue oppressive feeling, U is very comfortable when applied to humanbody.

Especially in case of driving vehicles, when a fuel-burning appliance (apocket heater) of the present invention is applied to back of a driveror used under a pretty wide band for trousers, almost all vent holes ofupper and lower surfaces of case might be choked. For precaution of suchcases, vent holes 29 are preferably formed to side surfaces too, asshown by imaginary line in FIG. 3.

I claim:

1. A portable warming appliance for burning a solid fuel comprising acase capable of being carried on a person and having similar casemembers pivoted to each other on one side of said members,noncombustible fiber wooly .material completely filling the inside ofsaid case members for holding the solid fuel therebetween, perforationsin said casefor conducting air through said perforations and said fiberwooly material to the solid fuel and transmitting heat produced by .thecombustion of the solid fuel through said fiber wooly material to saidcase.

2. A warming appliance as described in claim 1, wherein said casemembers have a maximum number of perforations at one end thereof, asmaller number of perforations in the midnumber of perforations in theother end thereof, and capable of positioning the firing portion of thesolid fuelin one end portion of said case and the other end portion ofthe solid fuel in the other end portion of said case.

3. A warming appliance as described in claim 1, including additionalperforations in both end portions of said case having slot like shapesand a triangular-shaped opening positioned at the firing point of thefuel.

4. A warming appliance as described in claim 3 wherein said slotlikeperforations are radially arranged in a semicircle.

5. A warming appliance as described in claim 1, including a frame ineach case member having an opening in the middle thereof and holdingsaid fiber wooly material therebeneath in each case member and holdingthe solid fuel on said fiber wooly material in the opening of the frame.

6. A warming appliance as described in claim 1, including an engaging'metal pivoted at one end and a depressed engaging portion of saidcasecapable of receiving said engaging metal providing a substantiallyflat contour for the case in its closed position.

7. A warming appliance as described in claim 6, wherein the engagingmetal is in the form of a flat plate.

8. A warming appliance as described in claim 6, wherein said-engagingmetal comprises a bent metal wire and a roller rotatably mounted in theend portion of said wire.

9. A warming appliance as described in claim 1, including a clothcovering for said case.

10. A warming appliance as described in claim 1, including openings inthe peripheral side of said case for supplying air 'therethrough.

11. A warming appliance as described in claim 1, including a bagenveloping said case.

' 12. A warming appliancefor burning a solid fuel-comprising a casehaving at least two .case members moveable from one bands are eachconnected to a side of said bag and means are provided for detachablyconnecting said bands.

14. A warming appliance as described in claim 13, wherein one of saidbands is adjustable lengthwise thereof and said means includes anengaging member for attaching said bands.

